Wristwatch



FIG. 1 is a top plan view of a wristwatch showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top right perspective view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image without the setting knob. 

The ornamental design for a wristwatch, as shown and described. 